Spray and pray. Maybe concentrate on praying. This submachinegun can carry you through the first mission, but without judicious modding quickly becomes irrelevant. Low damage coupled with high rate of fire means that Sidekick will empty your reserve of medium bullets in a single fight - and it`s not guaranteed that the fight will end before your supply of bullets.

It can accept dual-wielding mod, which somewhat mitigates the low damage output, but bullet supply becomes even more of a problem that way.